This documentation is archived and is not being maintained.

Page.InitOutputCache Method (Int32, String, String, OutputCacheLocation, String)

This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.

Initializes the output cache for the current page request.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

protected virtual void InitOutputCache(
	int duration,
	string varyByHeader,
	string varyByCustom,
	OutputCacheLocation location,
	string varyByParam


Type: System.Int32

The amount of time that objects stored in the output cache are valid.

Type: System.String

A semicolon-separated list of headers that content from the output cache will vary by.

Type: System.String

The Vary HTTP header.

Type: System.Web.UI.OutputCacheLocation

One of the OutputCacheLocation values.

Type: System.String

A semicolon-separated list of parameters received by a GET or POST method that content from the output cache will vary by.


An invalid value is specified for location.

You should not call this method. To enable and manipulate output caching for a page, use either the @ OutputCache directive in the .aspx file, or the methods and properties of the HttpCachePolicy class. The latter are accessible through Response.Cache syntax in the page's code. For more information, see Caching ASP.NET Pages.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0